Machine for sharpening rotary cutters.



PATENTED DEC. 20, 1904. N. K. SKOW.

MACHINE FOR SHARPENING ROTARY GUTTBRS.

APPLICATION FILED JAN. 9, 1904.

NO MODEL.

Umrm STATES Patented. December 20, 1904.

PATENT OFFICE.

NIELS K. SKOW, OF NEWTON, IOWA.

MACHlNE FOR SHARPENING ROTARY C UTTERS.

SPECIFICATION forming part of Letters Patent No. 778,151, dated.December 20, 1904.

Application filed January 9, 1904. Serial No. 188,307-

improved means for supporting and adjusting rotary cutters or disks. I IMy lnvention consistsof the construction, arrangement, and combinationof elements hereinafter set forth, pointed out in my claims,

and illustrated by the accompanying draw-v ings, in which i Figure 1 isa plan of the complete machine.

'Fig. 2 is a side elevation of the improved portion of the machine.

Fig. 3 is a front elevation of the improved portion of the machine. Fig.4 is a vertical section of portionsof the mechanism, illustrating theproper relation of the disk to the swaging-rol'ls.

The present machine is an improvement on or a modification of themachine for which Letters Patent of the United States No. 628,496 weregranted to me July 11, 1899, and this machine employs the samedrivinggear, clutches, and reducing-rolls that are illustrated anddescribed in the patent. There is this distinction, however, that whilethe patent shows a table hinged for vertical oscillation on the frame ofthe machine and arranged to support and swivel'adisk while the same issharpened my present invention relates to a table or support arrangedfor reciprocating relative to the machine-in a given horizontal plane.

In the construction of the machine as shown the numeral 10 designates abase or stand on which the operating parts of the machine are mounted.Machine-heads 11 12 are fixed to and rise from the base 10, parallelwith each other. A main shaft 13 is mounted for rotation in bearingsfixed to the upper ends of the heads 11 12,. and a main drivingwheel 14is fixed to said shaft and arranged to be driven by belting from a primemover. (Not shown.) A pinion 15 is mounted loosely on the shaft 13adjacent to the driving-wheel 14 and is provided with a clutch member 16concentric with said shaft. A clutch 17 is slidingly mounted on andkeyed to shaft 13 and is manually controlled through a lever 18,fulcrumed on the machine-head 12, to en-.

-A pinion 21 is mounted on one end of the shaft and meshes with aspur-gear 22 of materially greater diameter, fixed to one end of a lowerroll-shaft 23, which roll-shaft is journaled in bearings in themachine-heads and projects at bothends from saidbearings. A spur-gear 24is mounted rigidly on the central portionof the lower roll-shaft 23 andmeshes with a pinion 25 of the same diameter, rigidly mounted on thecentral portion of an upper roll-shaft 26, which upper roll-shaft isjournaled in bearings in the machine-heads and projects at both endsfrom said bearings.

The roll-shafts 23 26 are parallel with and adjacent to each other, butmay be in divergent planes relative to each other. Frusturnshaped rolls27, one only of which is shown,

- are mounted on the extremities of the shafts 23 26 opposite to thespur-gear 22 and are keyed thereto. The perimeters of the bases of therolls 27 27 travel in, contact with each other and in oppositedirections. A bar 28 is fixed to and projects horizontally from themachine-head 12 below and in vertical alimement with the rolls 27 Atable 29 is provided'and formed with flanges 3O 30, parallel with eachother. The table 29 is mounted on and may be adjusted longitudinally ofthe bar 28 to and from the machine-head 12. The flanges 30 30 contactwith and on opposite sides of the bar 28 and, together with the table29, constitute a slide bearing on said bar. A set-screw 31 may bemounted in one of the flanges 30 and arranged for engagement with oneface of the bar 28,

29, whereby said stand is pivoted to said table and arranged foroscillation or adjustment on a vertical axis. A swivel-socket 34 isformed on and extends upwardly from the center of the swivel-stand 32and is inclined outwardly relative to the vertical plane of themachinehead 12. Aswivel-stem is mounted loosely and for rotation in theswivel-socket 34 and is reduced at its upper end portion to form ashoulder or seat and a journal, on which a disk (not shown) may bemounted for revolution. The upper extremity of the swivel-stem 35 isscrew-threaded to receive a nut, (not shown,) whereby the disk may belocked to the stem. A lever or handle is fixed to and extendshorizontally outwardly from the swivel-stand 32. A segmental slot 41 isformed in the forward portion of the swivel-stand 32 concentric with theaxis of the bolt 33, and a locking-screw 42 extends through said slotand is seated in the table 29. By means of the locking-screw 42 theswivel-stand 32 may be locked in any position into which it may beadjusted on the table 29.

In the operation of the machine herein described the rolls are driventhrough the reducing train of gearing connected by the clutches 16 17,and the edge or marginal portion of the disk mounted on the stem 35 maybe engaged and swaged by said rolls. The Swivel-stand 32 may be swunglaterally by manual force applied through the lever or handle 40, to theend of moving the swivel-stem and disk through an arc across or awayfrom the vertical line of the axes of the rolls, thereby changing thedegree or extent of the bevel or swaging of the margin of the disk. Thedegree of feed or penetration of the disk between the rolls may beadjusted by moving the table 29 longitudinally of the bar 28, and suchmovement also may be efiected by manual force applied to the handle 40after the disk is mounted on the swivel-stem and before the set-screw 31is fixed in an engagement with the bar. "hen the setscrow 31 is notemployed, the feed, as well as the swage or bevel of the disk, is underthe control of the operator grasping the handle or lever 40 and may bealtered at will.

I claim as my invention-- 1. A machine for sharpening rotary cutters,comprising a frame, rolls mounted for rotation in said frame, a barmounted rigidly on and projecting horizontally from said frame beneathand beyond said rolls, a table mounted on and arranged for adjustmentlongitudinally of said bar, means for locking said table in any desiredposition between the ends of said bar, a swivel-stand mounted on andparallel with the upper face of said table, a bolt pivotally connectingthe inner portion oi the swivel-stand to said table, a handle extendingrearwardly from said swivel-stand, a stem mounted on and extendingupward from said swivel-stand and also extending outward relative tosaid rolls, and means for securing a disk on said stem.

2. A machine for sharpening rotary cutters, comprising a frame, rollsmounted for rotation in said frame, a bar mounted rigidly on andprojecting from said frame horizontally beneath and beyond said rolls, atable mounted on and arranged for adjustment longitudinally of said bar,a stand pivotally mounted on said table and arranged to be swunglaterally across the line of said rolls, a stem mounted in inclinedposition on said stand, and means for looking a disk to said stem.

Signed by me at Newton, Iowa, this 26th day of August, 1903.

NIELS K. SKOW.

Vitnesses:

E. J. SALMON, G. V. \Vmurmim.

